# Grub2: boot USB from GRUB prompt

When the PC will not boot from USB, you can use GRUB2 to boot from the USB.

In the GRUB menu: Press 'c' to go the GRUB prompt

`grub> ls`  
`(hd0) (hd0,msdos1) ...`  
`grub> set root=hd0,msdos1 `  
`grub> chainloader /efi/boot/bootx64.efi`  
`grub> boot`

The USB boot menu will appear.

The above is of course an example, every situation will be different. But the idea is the same.